my brother and his girl friend are in college. there about 2 hours apart and been together for a year. they love each other and so far make it work. but lately hes getting severe anxiety because she is extremely attractive but walks around alone at night. he has expressed his concern to her but she thinks shes tough when in reality she couldnt do anything if she got attacked. He is also upset because the frat guys (they havent done it to his gf yet) but they will jump out of the car and grab girls and shes so quiet she probably wouldn't say anything. he is so afraid of her being raped and she refuses to go out with another person, carry pepper spray, or carry a knife. Its almost like shes trying to prove a point. What can he do to make her realize she has to be careful and take protective measures?